Gypsy Moth

The gypsy moth is an invasive forest pest from Europe that is one of the most damaging tree defoliators currently. Aspen and oak top the list of over 500 preferred host species. Gypsy moth caterpillars feed on leaves of deciduous trees and are present in early-mid summer. Pictured to the Right (Left: Female, Right: Male)

Why are Gypsy Moths Such a Problem?

They are voracious eaters and can completely defoliate entire trees.

Outdoor recreation might be reduced as a result of bare trees, caterpillar presence on trees and roads, and feces falling from trees.

Repeated defoliation can lead to the death of many trees, changing the mix of tree species and affecting dependent wildlife.

Tree losses can impact forest and related industries.

Because gypsy moths are non-native, there are few natural enemies to keep them in check.

Office of the Environment will be doing a study on Lower Sioux forests to see if there is a problem occurring with Gypsy moths this Spring/Summer.